Re: [GIT PULL] fscrypt updates for 4.18

From: Theodore Y. Ts'o
Date: Tue Jun 05 2018 - 11:35:09 EST

On Tue, Jun 05, 2018 at 05:13:35PM +0200, Richard Weinberger wrote:
> > Add bunch of cleanups, and add support for the Speck128/256
> > algorithms. Yes, Speck is contrversial, but the intention is to use
> > them only for the lowest end Android devices, where the alternative
> > *really* is no encryption at all for data stored at rest.
> Will Android tell me that Speck is being used?

Well, today Android doesn't tell you, "Your files aren't being
encrypted" in some big dialog box. :-)

Whether a phone is using no encryption or not, and what encryption
algorithm, is fundamentally a property of the phone. It's used to
encrypt data at rest on the phone, so this isn't a data interchange
issue. I'm sure there will be some way of finding out --- by looking
at the source code for that phone, if nothing else.

But I suspect that if you are buying a phone in a first world country,
you're never going to see a phone with Speck on it --- unless you
build your own AOSP build and deliberately enable it for yourself,
anyway. :-)

This is really intended for "The Next Billion Users"; phones like
Android Go that was disclosed at the 2017 Google I/O conference, where
the unsubsidized price is well under $100 USD (so cheaper than the
original OLPC target).

- Ted